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The leaves of butternut are alternate and pinnately
compound. They are composed of 11 to 19 leaflets, each being
2 to 5 inches long. The midvein of the leaf (where the
leaflets attach) is hairy.
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The margins of butternut leaves are singly toothed.
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Black walnut leaves generally have more leaflets (15-23)
compared to butternut (11-19). The leaflet size is of black
walnut is typically smaller than butternut. Also butternut
leaves are hairy on their midvein, while black walnut is
hairless.
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Butternut and English walnut have the same general leaf
shape. They differ in the number of leaflets, butternut has
11-19 leaflets, while English walnut has only 5-9. Also,
butternut has a toothed margin, while the leaf margin of the
English walnut is entire.
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